MongoDB InsertData

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Inserting data

The format for the INSERT command is:

 db.collectionName.insert( 
  {
    key_1: 'value1',
    key_n: valueN
  }
 )

Note:

• character and date values must be enclosed in matching single (') or double quotes (").
• numeric values do not need quotes.
• key/value pairs are comma-separated (no comma needed after the last pair)
• each record is enclosed in curly brackets: {}

Department 10

The following examples will create a dept collection that will represent the DEPT table seen in the Oracle Sample Data. We will also include an object id (_id) for each record.

Add department 10:

db.dept.insert(
{
   _id: 10,
   deptno: 10,
   dname:  "ACCOUNTING",
   loc:    "NEW YORK"
})

Assuming you have no error messages, the system should respond with:

 WriteResult({ "nInserted" : 1 })

Department 20

Next add department 20:

db.dept.insert(
{
   _id: 20,
   deptno: 20,
   dname:  "RESEARCH",
   loc:    "DALLAS"

})

Department 40

Next department 40:

db.dept.insert(
{
   _id: 40,
   deptno: 40,
   dname:  "OPERATIONS",
   loc:    "BOSTON"

})

Things to note

If you are getting errors, check carefully that:

• every opening bracket has an appropriate closing bracket:
  • the insert statement uses round brackets: ()
  • a collection uses curly brackets: {}
• each key:value pair are separated by commas, except for the last item
• strings are enclosed in single or double quotes, e.g., 'myString', or "myString"

Exercise 2.1

• Compare how you added the above data and how it differs from INSERT records in a relational database
• Try and add Department 30

Employee data

More than one record can be added at a time. The following examples will create a collection called emp representing the emp table data.

Department 10 Employees

db.emp.insert( [
{
       empno: 7782,
       ename: 'CLARK',	
       job: 'MANAGER',
       mgr: 7839, 	
       hiredate: new Date('1989-06-09'),
       sal: 2450,
       deptno:	10
    },
    {
       empno:7839,
       ename: 'KING',
       job: 'PRESIDENT',
       hiredate: new Date('1980-11-17'),
       sal: 5000,
       deptno:	10
     },
     {
       empno: 7934,
       ename: 'MILLER',
       job: 'CLERK',
       mgr: 7782,
       hiredate: new Date('1985-01-23'),
       sal: 1300,
       deptno:	10
     }
   ]
 )

Next Step

Querying the collection